There are many spas with hammams (steam baths) in Paris, but the cheapest ones are usually around €35, which can be a bit steep if you’re just looking to unwind or enjoy a spring detox. But did you know that some of the Paris municipal pools are equipped with saunas? My favorite is the Piscine Pontoise (pictured) in the 5th, entry €4.80, which has a sauna and special nocturnal hours (Mon-Fri 8:15pm-11:45pm) with dimmed lights and classical music (special tariff €11.10 includes gym and sauna access). Josephine Baker in the 13th also has a sauna (note: they are closed for April 12-27 for cleaning) as well as an open sun deck for tanning, entry €3. Both of these pools are quite popular, so avoid weekends if possible, and don’t forget your speedo and swim cap (usually available in vending machines) if you’re going in the pool.